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Finding the Fourth Proportional to 18,630.60, 25,710.10 and 10,565.78

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Solution

The fourth proportional to 18,630.60, 25,710.10 and 10,565.78 is: 14,580.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,630.60 : 25,710.10 = 10,565.78 : x
  2. Step 2: Convert to fraction form
    18,630.60/25,710.10 = 10,565.78/x
  3. Step 3: Cross multiply
    18,630.60x = 25,710.10 × 10,565.78
  4. Step 4: Simplify right side
    18,630.60x = 271,647,079.00
  5. Step 5: Solve for x
    x = 271,647,079.00/18,630.60
  6. Step 6: Final answer
    x = 14,580.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.